The Kodak Duo Six-20 is a folding roll-film camera that takes 6×4.5cm exposures on 620 film. It was introduced in the 1930s and sat in the mid-tier of Kodak's folding range, aimed at amateurs who wanted a more compact alternative to the larger 6×9 folders of the period.

With only a single hammer result on file, the Duo Six-20 sold for £50 at UK auction in late 2025, which gives a narrow indication of what the model is worth today rather than a reliable median. Saleroom values for folding 620 cameras of this era are condition-sensitive, so a clean, working example will typically price higher than a tatty one, while non-functional bodies sell for less.